# Cat® GRADE Assistant vs engcon DC3

The clearest difference is update cadence: engcon DC3 at every 2 months against Cat® GRADE Assistant's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Cat® GRADE Assistant ships an update every 8 months, engcon DC3 every 2 months. The most recent releases landed on September 20, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | Cat® GRADE Assistant | engcon DC3 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 38 MB | 23 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Caterpillar Inc.](https://appshunter.io/developer/571668770) | [Engcon Nordic AB](https://appshunter.io/developer/1612669316) |

## What reviewers say

### Cat® GRADE Assistant

[App page](https://appshunter.io/ios/app/cat-grade-assistant/id1604853064)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### engcon DC3

[App page](https://appshunter.io/ios/app/engcon-dc3/id1612669314)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cat® GRADE Assistant free?

Cat® GRADE Assistant is free to download, with no in-app purchases.

### Is engcon DC3 free?

engcon DC3 is free to download, with no in-app purchases.

### Do Cat® GRADE Assistant or engcon DC3 have ads?

Neither Cat® GRADE Assistant nor engcon DC3 shows ads.

### Which is updated more often, Cat® GRADE Assistant or engcon DC3?

Cat® GRADE Assistant ships an update every 8 months, and engcon DC3 every 2 months. Most recently, Cat® GRADE Assistant was updated on September 20, 2026 and engcon DC3 on August 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*